strangebrou, I have a set of Richey SPD design mountain bike pedals. I also have used these pedals without a clipless shoe without damaging the pedals for some short hops. While I like the stiffness of my carbon soled road shoes, I use a pair of old, worn out mountain bike shoes with the touring bike for their walkability.

I did consider platform pedals for the touring bike, but I've used pedals with a retention device (starting with cleated toe clips) for so long that I felt it was best to use what I was most comfortable with.

Brad